netdev - Re: [PATCH net] veth: add vlan features

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Message-Id: <20130719.173743.1638667044880555527.davem@davemloft.net>
Date:	Fri, 19 Jul 2013 17:37:43 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	fbl@...hat.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net] veth: add vlan features

From: Flavio Leitner <fbl@...hat.com>
Date: Thu, 18 Jul 2013 16:15:11 -0300

> The veth device doesn't provide the vlan features,
> so TSO for example is disabled and that causes
> performance issues when using tagged traffic.
> 
> The test topology looks like this:
> 
>     br0                     br1
>   /   \                  /     \
> vnet  veth0.10 ----- veth1.10   vnet
> VM                               VM
> 
> The netperf results with current veth driver:
> MIGRATED TCP STREAM TEST from 192.168.1.1 ()
> port 0 AF_INET to 192.168.1.2 () port 0 AF_INET
> Recv   Send    Send
> Socket Socket  Message  Elapsed
> Size   Size    Size     Time     Throughput
> bytes  bytes   bytes    secs.    10^6bits/sec
> 
>  87380  16384  16384    10.01    2210.22
> 
> Now after applying the proposed patch:
> MIGRATED TCP STREAM TEST from 192.168.1.1 ()
> port 0 AF_INET to 192.168.1.2 () port 0 AF_INET
> Recv   Send    Send
> Socket Socket  Message  Elapsed
> Size   Size    Size     Time     Throughput
> bytes  bytes   bytes    secs.    10^6bits/sec
> 
>  87380  16384  16384    10.00    13067.47
> 
> Signed-off-by: Flavio Leitner <fbl@...hat.com>

Applied.
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